Trojan:SymbOS/Bootton.C

Classification

Malware

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Bootton.C, SymbOS/Bootton.C

Summary

Bootton.C is a SIS file that installs small component that resets the device if executed, this component is installed into locations where it replaces system and third party applications. Bootton.C installs also Doomboot.A components that cause reboot to fail. Thus leaving phone in unusable state. In some cases installation fails but still some components of the malware are installed into the phone.

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

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Submit a sample

Submit a file or URL for further analysis.

Technical Details

In its structure Bootton.C is quite similar to Skulls family trojans. With the exception that instead of replacing system files with corrupted binaries,the Bootton.C uses application that causes device to reboot.

In the device that is infected with Bootton.C, pressing menu button or any system application button the device immediately reboots. Installed Doomboot.A components cause reboot to fail. Thus leaving phone in unusable after reboot state.

Bootton.C disables most of critical system functions and third party file managers, so that even if the device wouldn't immediately reboot it is still unusable before it is disinfected.

In addition of disabling applications on the phone, the Bootton.C also installs modified Cabir that SymbOS/Onehop.A uses to distribute Bootton.C. But this file does not get executed automatically, and even if started by user is unable to send anything as the file it is trying to send does not exist on the system.

If Bootton.C is installed only the calling from the phone and answering calls works. All functions which need some system application, such as SMS and MMS messaging, web browsing and camera no longer function.